Convert QuickstartWeatherServer to file-based project and remove FileBasedMcpServer sample

ModelContextProtocol.slnx

@@ -47,7 +47,6 @@
     <Project Path="samples/ProtectedMcpClient/ProtectedMcpClient.csproj" />
     <Project Path="samples/ProtectedMcpServer/ProtectedMcpServer.csproj" />
     <Project Path="samples/QuickstartClient/QuickstartClient.csproj" />
-    <Project Path="samples/QuickstartWeatherServer/QuickstartWeatherServer.csproj" />
     <Project Path="samples/TestServerWithHosting/TestServerWithHosting.csproj" />
   </Folder>
   <Folder Name="/Solution Items/">

samples/InMemoryTransport/Program.cs

@@ -1,4 +1,4 @@
-using ModelContextProtocol.Client;
+using ModelContextProtocol.Client;
 using ModelContextProtocol.Protocol;
 using ModelContextProtocol.Server;
 using System.IO.Pipelines;

samples/QuickstartWeatherServer/Program.cs

@@ -1,8 +1,16 @@
+#!/usr/bin/env -S dotnet run --
+#:package Microsoft.Extensions.Hosting
+#:project ../../src/ModelContextProtocol/ModelContextProtocol.csproj
+
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
-using QuickstartWeatherServer.Tools;
+using ModelContextProtocol;
+using ModelContextProtocol.Server;
+using System.ComponentModel;
+using System.Globalization;
 using System.Net.Http.Headers;
+using System.Text.Json;
 
 var builder = Host.CreateApplicationBuilder(args);
 
@@ -20,3 +28,68 @@
 builder.Services.AddSingleton(httpClient);
 
 await builder.Build().RunAsync();
+
+// Weather Tools
+[McpServerToolType]
+file sealed class WeatherTools
+{
+    [McpServerTool, Description("Get weather alerts for a US state.")]
+    public static async Task<string> GetAlerts(
+        HttpClient client,
+        [Description("The US state to get alerts for. Use the 2 letter abbreviation for the state (e.g. NY).")] string state)
+    {
+        using var jsonDocument = await client.ReadJsonDocumentAsync($"/alerts/active/area/{state}");
+        var jsonElement = jsonDocument.RootElement;
+        var alerts = jsonElement.GetProperty("features").EnumerateArray();
+
+        if (!alerts.Any())
+        {
+            return "No active alerts for this state.";
+        }
+
+        return string.Join("\n--\n", alerts.Select(alert =>
+        {
+            JsonElement properties = alert.GetProperty("properties");
+            return $"""
+                    Event: {properties.GetProperty("event").GetString()}
+                    Area: {properties.GetProperty("areaDesc").GetString()}
+                    Severity: {properties.GetProperty("severity").GetString()}
+                    Description: {properties.GetProperty("description").GetString()}
+                    Instruction: {properties.GetProperty("instruction").GetString()}
+                    """;
+        }));
+    }
+
+    [McpServerTool, Description("Get weather forecast for a location.")]
+    public static async Task<string> GetForecast(
+        HttpClient client,
+        [Description("Latitude of the location.")] double latitude,
+        [Description("Longitude of the location.")] double longitude)
+    {
+        var pointUrl = string.Create(CultureInfo.InvariantCulture, $"/points/{latitude},{longitude}");
+        using var locationDocument = await client.ReadJsonDocumentAsync(pointUrl);
+        var forecastUrl = locationDocument.RootElement.GetProperty("properties").GetProperty("forecast").GetString()
+            ?? throw new McpException($"No forecast URL provided by {client.BaseAddress}points/{latitude},{longitude}");
+
+        using var forecastDocument = await client.ReadJsonDocumentAsync(forecastUrl);
+        var periods = forecastDocument.RootElement.GetProperty("properties").GetProperty("periods").EnumerateArray();
+
+        return string.Join("\n---\n", periods.Select(period => $"""
+                {period.GetProperty("name").GetString()}
+                Temperature: {period.GetProperty("temperature").GetInt32()}°F
+                Wind: {period.GetProperty("windSpeed").GetString()} {period.GetProperty("windDirection").GetString()}
+                Forecast: {period.GetProperty("detailedForecast").GetString()}
+                """));
+    }
+}
+
+// HttpClient Extension Methods
+file static class HttpClientExt
+{
+    public static async Task<JsonDocument> ReadJsonDocumentAsync(this HttpClient client, string requestUri)
+    {
+        using var response = await client.GetAsync(requestUri);
+        response.EnsureSuccessStatusCode();
+        return await JsonDocument.ParseAsync(await response.Content.ReadAsStreamAsync());
+    }
+}

samples/QuickstartWeatherServer/README.md

@@ -0,0 +1,61 @@
+# QuickstartWeatherServer Sample
+
+This sample demonstrates how to create an MCP server that provides weather-related tools using the weather.gov API. This is a file-based program that runs without a traditional project file.
+
+## Requirements
+
+- .NET 8.0 SDK or later
+- No project file required!
+
+## Running the Sample
+
+Simply run the Program.cs file directly:
+
+```bash
+dotnet run Program.cs
+```
+
+Or on Unix-like systems, make the file executable:
+
+```bash
+chmod +x Program.cs
+./Program.cs
+```
+
+The server will start and listen for MCP messages on stdin/stdout (stdio transport).
+
+## Available Tools
+
+The server provides two weather tools:
+
+1. **GetAlerts** - Get weather alerts for a US state (use 2-letter abbreviation like "NY")
+2. **GetForecast** - Get weather forecast for a location (requires latitude and longitude)
+
+## Testing the Server
+
+You can test the server using the QuickstartClient or any MCP-compatible client:
+
+```bash
+# From the repository root
+dotnet run --project samples/QuickstartClient samples/QuickstartWeatherServer
+```
+
+Or test with the MCP inspector:
+
+```bash
+npx @modelcontextprotocol/inspector dotnet run Program.cs
+```
+
+## What This Sample Shows
+
+- Creating an MCP server using `Host.CreateApplicationBuilder`
+- Registering tools with `WithTools<T>()`
+- Using dependency injection to provide HttpClient to tools
+- Configuring logging to stderr for MCP compatibility
+- Using file-scoped classes for tool implementations
+
+## Reference
+
+- [File-Based Programs Tutorial](https://learn.microsoft.com/en-us/dotnet/csharp/fundamentals/tutorials/file-based-programs)
+- [Model Context Protocol Specification](https://modelcontextprotocol.io/specification/)
+- [Weather.gov API](https://www.weather.gov/documentation/services-web-api)